. >> about 600,000 people in the united states have joined car sharing programs and that number is expected to grow. >> it's well established, car sharing is not going anywhere. >> not only are we saving gas. but it's a great time to driving a car and it doesn't get better than that. >> reporter: researchers point out the average car share user say they save $150 to $4250 a month. >> terry: san francisco's new appointing homeless czar is making nau wet houses. they tell us san francisco's wet house proposal is modeled after seattle. >> if you don't mind, i'm going to take a drink. >> anthony been set the alcoholic. >> my ambition is to wake up in the morning and be able to open my refrigerator and have a beer. that is my ambition. i guess that is my future. >> he is no longer homeless. >> one of these days i would like to have me -- >> he lives in seattle's so-called wet houses, where they are allowed to drink under the supervision of addiction counselors. >> you are doing well. >> you got pretty wasted yesterday. >> the alcohol is purchased by using part of the public assistance checks. >>